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检索条件"任意字段=IEEE Symposium on Large-Scale Data Analysis and Visualization"

共 4897 条记录，以下是4801-4810 订阅

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Ice lead orientation characteristics in the winter Beaufort Sea

Ice lead orientation characteristics in the winter Beaufort ...

引用

ieee International symposium on Geoscience and Remote Sensing (IGARSS)

作者： G.F. Cunningham R. Kwok J. Banfield Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA Department of Mathematical Sciences Montana State University Bozemon MT USA

The directional orientations of leads in the winter ice pack of the Beaufort Sea are studied both spatially and temporally. data from the European Earth Resources Satellite-1 (ERS-1) synthetic aperture radar (SAR) was used. The SAR data was produced in image form at the Alaska SAR Facility (ASF) with 100m/spl times/100m pixel resolution. The lead ice pixels, which included all non-multiyear ice; were defined using a simple thresholding of the radar backscatter values. The orientations of the leads covering the Beaufort Sea during the period of January through March of 1992 were derived using a lead skeletonization technique. Results show a strong temporal persistence in the distribution and orientation of the leads during this period. The orientation of leads newly-formed within a 3-day period were then compared to both the local and large-scale ice deformation fields. Results show a consistent relationship between the orientations of the newly-formed leads and the principal direction of shear within the ice motion fields.< >

关键词： Ice Image segmentation large-scale systems Radar imaging Backscatter Image analysis Pixel Image resolution Propulsion Laboratories

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Quality Control And Diagnostic System For LSI Fabrication

Quality Control And Diagnostic System For LSI Fabrication

引用

ieee International symposium on Semiconductor Manufacturing

作者： M. Sakata S. Ishikawa I. Miyazaki T. Okabe Production Engineering Research Laboratory Hitachi and Limited Yokohama Kanagawa Japan Takasaki Manufacturing Operation Hitachi and Limited Takasaki Gunma Japan Total Manufacturing Operation Hitachi and Limited Tokyo Japan

Improving initial yield is one way to overcome the ever competitive market of semiconductors. To accomplish this, analyzing particle/pattern defects is a method in finding a countermeasure. We have developed a system, from controlling the master parameter setting, derive where and what the problem is. It gathers data from QC data; especially related to particles and pattern defects. This system is completely independent from other systems, thus enabling it to be used in any type of line(e.g. unautomated/automated, large/small.)

关键词： Quality control large scale integration Fabrication Control systems Semiconductor device manufacture Automatic control data analysis Inspection Testing Production engineering

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High-throughput data compressor designs using content addressable memory

High-throughput data compressor designs using content addres...

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ieee International symposium on Circuits and Systems (ISCAS)

作者： Ren-Yang Yang Chen-Yi Lee Department of Electronics Engineering National Chiao Tung University Taiwan

This paper presents a novel VLSI architecture for high-speed data compressor designs which implement the well-known LZ77 algorithm. The architecture mainly consists of three units, namely content addressable memory, match logic, and output stage. The content address memory generates a set of hit signals which identify those positions whose symbols in a specified window are the same as input symbol. These hits signals are then passed to the match logic which determines one matched stream and its match length and location in the window to form the kernel of compressed data. These two items are then passed to the output stage for packetization before sent out. By trading off hardware complexity and compression ratio, 2KB window size and adjustable maximum match length are considered in our proto-type VLSI chip. Simulation results show that, based on a 0.8 /spl mu/m CMOS process technology, clock speed up to 50 MHz can be achieved. This implies that the developing data compressor chip can handle many real-life applications such as in video coding and high-speed data storage systems.< >

关键词： Very large scale integration Logic Algorithm design and analysis Associative memory Impedance matching Signal generators Signal processing Kernel Hardware CMOS process

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Defect and fault tolerant scan chains

Defect and fault tolerant scan chains

引用

ieee International symposium on Defect and Fault Tolerance in VLSI Systems

作者： R. Kermouche Y. Savaria Electrical Engineering Department École Polytechnique de Montréal Montreal QUE Canada

Several fault tolerant scan chain designs are proposed, including the combinational one data flow and two data flow approaches, and the counter based approach. It is shown that these designs have no critical portion, where a single defect would make the chain inoperative. The yield of these chains is evaluated to show that a long intolerant chain is a predominant yield or harvest detractor, while a tolerant chain becomes an insignificant factor to system yield or harvest.

关键词： Fault tolerance System testing Circuit testing Very large scale integration Control systems Integrated circuit testing Sequential analysis Fault tolerant systems Application specific integrated circuits Counting circuits

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Time-domain modeling of composite arrays for underwater imaging

Time-domain modeling of composite arrays for underwater imag...

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ieee symposium (IUS) Ultrasonics

作者： G.L. Wojcik D.K. Vaughan V. Murray J., Jr. Mould Weidlinger Associates Inc. Los Altos CA USA UDI-Wimpol Limited Aberdeen UK

Time-domain, finite element simulations are used to explore some design issues and the practical modeling envelope for 1-3 composite arrays in underwater pulse-echo imaging transducers. This provides a relatively new perspective on the design problem via large-scale 2D and 3D transient simulations that include many piezoelectric pillars within the composite. Cross-talk from a prototype 150 kHz array is modeled and compared to data Some of the composite slab's dispersion behavior is derived from its impulse response and used to interpret cross-talk. Numerical experiments on a 500 kHz design demonstrate effect of pillar taper and distribution-freedoms offered by injection molding. Fourier optics manipulation of the projected acoustic field is illustrated. These studies support an ongoing design and fabrication collaboration under the aegis of United States and Commonwealth naval agencies

关键词： Time domain analysis Finite element methods Underwater acoustic arrays Piezoelectric transducers Acoustic imaging/mapping Crosstalk

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An efficient VLSI implementation of vector-radix 2-D DCT using mesh-connected 2-D array

An efficient VLSI implementation of vector-radix 2-D DCT usi...

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ieee International symposium on Circuits and Systems (ISCAS)

作者： Kyung-Wook Shin Heung-Woo Jeon Yong-Seum Kang Department of Electronic Engineering Kum-Oh National University of Technology Kumi South Korea

This paper describes an efficient array algorithm for parallel computation of vector-radix two-dimensional (2-D) discrete cosine transform (VR-DCT), and its VLSI implementation. By mapping the 2-D VR-DCT onto a 2-D array of processing elements (PEs), the DCT is efficiently computed with high concurrency and local data exchanges between PEs. The proposed array algorithm features architectural modularity, regularity and locality, so that it is very suitable for VLSI realization. Also, no transposition memory is required. It has the time complexity of O(N+N/sub NZD//spl middot/log/sub 2/N) for (N/spl times/N) 2-D DCT, where N/sub NZD/ is the number of non-zero digits in the canonic-signed digit (CSD) representation of DCT kernel. Based on the proposed array algorithm, an array processor for (8/spl times/8) 2-D DCT is designed using 1.5 /spl mu/m double metal CMOS technology. From simulation results, it is estimated that (8/spl times/8) 2-D DCT (with N/sub NZD/=4) can be computed in about 0.88 /spl mu/sec at 50 MHz clock frequency, resulting in the throughput rate of about 72 Mega pixels/sec.< >

关键词： Very large scale integration Discrete cosine transforms Concurrent computing CMOS technology Frequency estimation Two dimensional displays Kernel Algorithm design and analysis CMOS process Computational modeling

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Cosmic Explorer: A virtual reality environment for exploring cosmic data

Cosmic Explorer: A virtual reality environment for exploring...

引用

1993 ieee Research Properties in Virtual Reality symposium, VRAIS 1993

作者： Song, D. Norman, M.L. Nat. Center for Supercomput. Applications 605 E. Springfield Ave. ChampaignIL61820 United States

ISBN: (纸本)0818649100

Supercomputer simulations now can produce multilevel, multi-scale large data sets that require new techniques in scientific visualization and higher levels of hardware performance. The authors explore the use virtual reality (VR) technology in this connection. Cosmic Explorer is a VR environment visualizing numerical and observational cosmology data. They have implemented multi-scale visualization techniques that will work on large, multilevel time-dependent data sets. VR provides natural ways to navigate in an immersive environment, and scientific visualization requires overviewing. The techniques bridge the two in a VR system involving the BOOM and the dataGlove. Combining modern visualization hardware, software, and VR technology, the authors are able to create a system that lets users explore the virtual space created by numerical simulations with ease and naturalness. © 1993 ieee.

关键词： data visualization

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FAST VOLUME RENDERING OF COMPRESSED data 4

FAST VOLUME RENDERING OF COMPRESSED DATA

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visualization 93, the 4th Annual ieee Conference on visualization

作者： NING, P HESSELINK, L STANFORD UNIV DEPT ELECT ENGNSTANFORDCA 94305

ISBN: (纸本)0818639407

Volume rendering has been proposed as a useful tool for extracting information from large datasets, where non-visual analysis alone may not be feasible. The scale of these applications implies that data management is an important issue that needs to be addressed. Most volume rendering algorithms, however, process data in raw, uncompressed form. In previous work, we introduced a compressed volume format that may be volume rendered directly with minimal impact on rendering time. In this paper, we extend these ideas to a new volume format that not only reduces storage space and transmission time, but is designed for fast volume rendering as well. The volume dataset is represented as indices into a small codebook of representative blocks. With this data structure, volume shading calculations need only be performed on the codebook and image generation is accelerated by reusing precom-puted block projections. © 1993 ieee.

关键词： large dataset

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Pyramid-based approach to interactive terrain visualization

Pyramid-based approach to interactive terrain visualization

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Proceedings of the 1993 Parallel Rendering symposium

作者： Kaba, James Peters, Joseph Natl Information Display Lab Princeton United States

ISBN: (纸本)0818649208

This paper describes a multiresolution approach to the visualization of surface data. The algorithms discussed allow the generation of arbitrary views of 3-dimensional surfaces. Image processing and texture mapping techniques are combined in a new 3-pass scanline algorithm to achieve smooth and continuous translations, rotations and scale changes of large data sets. The implementations of the algorithms on a massively parallel SIMD video supercomputer, the Princeton Engine, allows the scenes to be generated interactively at video rates.

关键词： Image processing

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Advanced methods of performance data processing and analysis 7

Advanced methods of performance data processing and analysis

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7th International Parallel Processing symposium, IPPS 1993

作者： Rover, D.T. Waheed, A. Doetsch, M. Dept. of Electr. Eng. Michigan State Univ. East LansingMI48824 United States

ISBN: (纸本)0818634421

The analysis of program performance on massively parallel (MPP) systems is a non-trivial task which is increasingly performed using visualization tools. Conventional processing, analysis, and display methods typically do not adequately support the evaluation of program performance on large-scale parallel systems. These methods can be limited by the sheer volume of performance data and often lack any rigorous approach to analyze it. The objective of the approach outlined is to develop a more powerful method to analyze performance data visually as well as statistically which is scalable and extensible and which represents some physical and/or logical structure of the parallel system state. The approach focuses on applying image processing and analysis techniques to MPP performance analysis. This approach has been prototyped and tested for proof-of-concept. The AVS scientific visualization tool is used to analyze and display images of performance data from program executions on actual machines. Results of these experiments are presented. © 1993 ieee.

关键词： data visualization

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